Northern Secretary John Reid has urged all sides in the six counties to stop playing politics with the new policing board.
Dr Reid said: "I will not be lobbied by politicians or interested parties on any side of the political divide."
His comments come after UUP leader David Trimble insisted that he be allowed to choose an Ulster Unionist as the first chairman of the board, which will oversee reform of the RUC.
The board is made up of 10 politicians and nine non-affiliated independents.
Dr Reid is expected to name one of the independents as the first chairman.